Pilot frequency sequence generation method and apparatus

Abstract

Disclosed in the present invention are a method and an apparatus for generating a pilot frequency sequence. The method comprises: generating a data pilot frequency by a data pilot frequency generator of a transmitting end, and generating a multi-stream data pilot frequency sequence by a multi-stream data pilot frequency sequence mapper of the transmitting end; generating an orthogonal code by an orthogonal code generator of the transmitting end, and generating an extracted orthogonal code word by a column loop extractor of the transmitting end; obtaining, by the transmitting end, a data pilot frequency sending value by multiplying the multi-stream data pilot frequency sequence of each symbol by the corresponding orthogonal code word; and sending the data pilot frequency sending value to a receiving end. The present invention effectively improves the accuracy of phase tracking obtained at the receiving end, and thus, high-order modulation can be effectively dealt with.

1 . A method for generating a pilot frequency sequence, comprising:
 generating a data pilot frequency by a data pilot frequency generator of a transmitting end, and generating a multi-stream data pilot frequency sequence by a multi-stream data pilot frequency sequence mapper of the transmitting end;   generating an orthogonal code by an orthogonal code generator of the transmitting end, and generating an extracted orthogonal code word by a column loop extractor of the transmitting end;   obtaining, by the transmitting end, a data pilot frequency sending value by multiplying the multi-stream data pilot frequency sequence of each symbol by the corresponding orthogonal code word; and   sending, by the transmitting end, the data pilot frequency sending value to a receiving end.   
     
     
         2 . The method for generating the pilot frequency sequence according to  claim 1 , wherein, the method further comprises:
 obtaining a TS pilot frequency sending value by generating a pilot frequency TS pilot frequency by a TS pilot frequency generator of the transmitting end and generating a multi-stream TS pilot frequency sequence by a multi-stream TS pilot frequency sequence mapper of the transmitting end; and   sending the TS pilot frequency sending value to the receiving end.   
     
     
         3 . The method for generating the pilot frequency sequence according to  claim 2 , wherein, the method further comprises:
 generating a multi-stream TS OFDM symbol and a multi-stream data OFDM symbol by an OFDM symbol generator of the transmitting end, inserting the multi-stream TS pilot frequency sequence between the multi-stream TS OFDM symbols, and inserting the multi-stream data pilot frequency sequence between the multi-stream data OFDM symbols.   
     
     
         4 . The method for generating the pilot frequency sequence according to  claim 2 , wherein, the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to:
 obtain TS phase estimation;   compensate the TS phase estimation;   obtain channel estimation of a TS pilot frequency point by removing an orthogonal matrix on a TS non pilot frequency position and performing channel estimation, and performing interpolation; and   perform phase offset compensation by estimating a phase offset according to the channel estimation and current pilot frequency and updating the phase offset.   
     
     
         5 . The method for generating the pilot frequency sequence according to  claim 4 , wherein, the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to obtain the TS phase estimation and compensate the TS phase estimation comprising:
 the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to estimate TS phase rotation by conjugating and multiplying TS adjacent symbols to obtain a product of sum square and phase rotation; and   compensate the TS phase rotation.   
     
     
         6 . The method for generating the pilot frequency sequence according to  claim 1 , wherein, the method for generating the pilot frequency sequence is applied to a Wi-Fi communication system. 
     
     
         7 - 12 . (canceled) 
     
     
         13 . An electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein, the processor is configured to:
 generate a data pilot frequency by a data pilot frequency generator, and generate a multi-stream data pilot frequency sequence by a multi-stream data pilot frequency sequence mapper;   generate an orthogonal code by an orthogonal code generator, and generate an extracted orthogonal code word by a column loop extractor;   obtain a data pilot frequency sending value by multiplying the multi-stream data pilot frequency sequence of each symbol by the corresponding orthogonal code word; and   send the data pilot frequency sending value to a receiving end.   
     
     
         14 . A computer-readable medium having a computer instruction stored thereon, wherein, the computer instruction, when executed by a processor, implements:
 generating a data pilot frequency by a data pilot frequency generator, and generating a multi-stream data pilot frequency sequence by a multi-stream data pilot frequency sequence mapper;   generating an orthogonal code by an orthogonal code generator, and generating an extracted orthogonal code word by a column loop extractor;   obtaining a data pilot frequency sending value by multiplying the multi-stream data pilot frequency sequence of each symbol by the corresponding orthogonal code word; and   sending the data pilot frequency sending value to a receiving end.   
     
     
         15 . The electronic device according to  claim 13 , wherein, the processor is further configured to:
 obtain a TS pilot frequency sending value by generating a TS pilot frequency by a TS pilot frequency generator and generating a multi-stream TS pilot frequency sequence by a multi-stream TS pilot frequency sequence mapper; and   send the TS pilot frequency sending value to the receiving end.   
     
     
         16 . The electronic device according to  claim 15 , wherein, the processor is further configured to:
 generate a multi-stream TS OFDM symbol and a multi-stream data OFDM symbol by an OFDM symbol generator, insert the multi-stream TS pilot frequency sequence between the multi-stream TS OFDM symbols, and insert the multi-stream data pilot frequency sequence between the multi-stream data OFDM symbols.   
     
     
         17 . The electronic device according to  claim 15 , wherein, the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to:
 obtain TS phase estimation;   compensate the TS phase estimation;   obtain channel estimation of a TS pilot frequency point by removing an orthogonal matrix on a TS non pilot frequency position and performing channel estimation, and performing interpolation; and   perform phase offset compensation by estimating a phase offset according to the channel estimation and current pilot frequency and updating the phase offset.   
     
     
         18 . The electronic device according to  claim 17 , wherein, the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to obtain the TS phase estimation and compensate the TS phase estimation comprising:
 the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to estimate TS phase rotation by conjugating and multiplying TS adjacent symbols to obtain a product of sum square and phase rotation; and compensate the TS phase rotation.   
     
     
         19 . The electronic device according to  claim 15 , wherein, the electronic device is applied to a Wi-Fi communication system. 
     
     
         20 . The computer-readable medium according to  claim 14 , wherein, the computer instruction, when executed by a processor, further implements:
 obtaining a TS pilot frequency sending value by generating a TS pilot frequency by a TS pilot frequency generator and generating a multi-stream TS pilot frequency sequence by a multi-stream TS pilot frequency sequence mapper; and   sending the TS pilot frequency sending value to the receiving end.   
     
     
         21 . The computer-readable medium according to  claim 20 , wherein, the computer instruction, when executed by a processor, further implements:
 generating a multi-stream TS OFDM symbol and a multi-stream data OFDM symbol by an OFDM symbol generator, inserting the multi-stream TS pilot frequency sequence between the multi-stream TS OFDM symbols, and inserting the multi-stream data pilot frequency sequence between the multi-stream data OFDM symbols.   
     
     
         22 . The computer-readable medium according to  claim 20 , wherein, the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to:
 obtain TS phase estimation;   compensate the TS phase estimation;   obtain channel estimation of a TS pilot frequency point by removing an orthogonal matrix on a TS non pilot frequency position and performing channel estimation, and performing interpolation; and   perform phase offset compensation by estimating a phase offset according to the channel estimation and current pilot frequency and updating the phase offset.   
     
     
         23 . The computer-readable medium according to  claim 22 , wherein, the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to obtain the TS phase estimation and compensate the TS phase estimation comprising:
 the TS pilot frequency sending value and the data pilot frequency sending value are configured to enable the receiving end to estimate TS phase rotation by conjugating and multiplying TS adjacent symbols to obtain a product of sum square and phase rotation; and compensate the TS phase rotation.   
     
     
         24 . The computer-readable medium according to  claim 14 , wherein, the computer-readable medium is applied to a Wi-Fi communication system